/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneInitialValueCache.h
Only properties cached using aFTrackInstancePropertyBindingsinstance will be retrieved using this method.
[TOptional](API\Runtime\Core\IO\TOptional)< [FInitialValueIndex](API\Runtime\MovieScene\EntitySystem\FInitialValueIndex) > FindPropertyIndex ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * BoundObject, const [FName](API\Runtime\Core\UObject\FName) & PropertyPath )